Skate



Dec. 21 1926.

w. JERRAE SKATE Filed Feb. 2, 1926 2, Sheets-Sheet A mm mm IN VEN TOR.

LU. JERRFIE "mgw A TTORNEYJ Patented Dec. 21, 192%.

UNITED STATES PATENT @FFICE.

WILLIAM JERRAE, (3F SAN FRANCISCO, CALIFORNIA.

' SKATE.

Application filed February This invention relates to improvements inskates, and has particular reference to a selfpropelling skate.

The principal object of this invention is to produce a skate wherein theuser may transmit motion to the wheels of the skate for the purpose offorward movement.

Another object is to produce a skate -wherein the leverage is thegreatest possible within the limitation of the skate size.

A further object is to provide means for lowering the center of gravity,thereby assisting in balancing the skate.

Other objects and advantages will be ap parent during the course of thefollowing description.

In the accompanying drawings forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same,

Figure I is a top plan view of my improved skate,

Figure II is a side elevation of Figure I,

Figure III is an enlarged detail view showing the gear actuatingmechanism and rest,

Figure IV is a cross-sectional view showing the driving mechanism, and

Figure V is a detail view showing the roller clutch mechanism.

At the present time in roller skating it is necessary to swing the footin order to gain momentum when traveling along a level surface. It is myintention to devise a skate wherein it will not be necessary for theuser to take either skate off the ground, securing the propelling forceby a mere up and down movement of the feet.

In the accompanying drawings wherein for the purpose of illustration isshown a preferred embodiment of my invention, the numerals 5 and 6 referto wheels which contact the ground and serve to support the user. Thesewheels are joined one to the other by frame which is designated as awhole by the numeral 7 and essentially consists of three parts, namely,a front fork 8, a rear fork 9 and a central yoke 11 which joins thefront and rear forks.

By viewing Figures I and II, it will be noted that the front fork isextending beyond the front wheel and that the ends of the fork arespaced by a spacer 19 through which a bolt 13 passes. This bolt servesto pivotally support a pair of rearwardly extending rods 14 and 16. Therods are 2, 1826. Serial No. 35,571.

spaced from the ends of the fork 8 as by spacers 17 and 18.

The rods 14 and 16 extend toward the rear wheel 5 to a point beneath theyoke and near the rear end thereof, at which point the two rods arejoined and secured to an actuating bar 19. This actuating bar hassecured to the rear end thereof an upwardly extending rack bar 21 uponwhich teeth '22 are formed. These teeth are adapted {to engage the teethof a gear 23 which gear is provided with cam-shaped slots 24 withinwhich rollers 26 are positioned. These rollers are adapted to engage acollar 27 which is attached to a plate 28 secured to the rear wheel 5 inany suitable manner.

The plate 28 is of a diameter greater than the diameter of the gear 23as is also a plate 29. This construction forms a channel between whichthe rack bar 21 moves thereby preventing the teeth of the rack bar frombecoming disengaged from the teeth of the gear.

By viewing Figures II and III, it will be noted that the rack barcarries segmental stop members designated by the numerals 31 and 32.These segmental stop members serve to limit the up and down movement ofthe rack bar and may be provided with rubber buffers as indicated at 33,(see Fig ure III).

These buffers 33 merely serve to prevent any jar when the segmentalmembers come in contact with the teeth of the gear.

A guide bar is shown at 34: and serves to prevent a twisting of theactuating bar 19. This guide bar 34; also serves to lock the actuatingbar when desired.

By employing a pin in the opening 36, the actuating bar may be locked tothe guide bar after which the skate may be employed in the usual mannerof employing roller skates.

I have shown in dotted lines at A. and B the position of toe and heelplates, which would be employed and to which the customary straps wouldbe attached, which straps would engage the shoe in the usual manner.

By referring to Figure IV, it will be noted that the bolt 37 passesthrough a tu bular member 38 which prevents the nut 39 from squeezingthe plates 28 and 29 together, which would-exert a binding action andprevent the perfect operation of my device.

It will thus be seen that I have provided a skate which will perform allthe objects set forth in a simple and eflicient manner.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same and thatvarious changes relative to the size, shape and arrangement of parts maybe resorted to without departing from the spirit of the invention, orthe scope of the subjoined claim.

Having thus described my invention, I claim In a skate, a front wheeland a rear wheel, a frame extending between said front and said rearwheel, said frame having a fork extending to a point beyond the forwardedge of said -front wheel, a pair of parallel soaced bars pivotallyconnected to said frame at a point adjacentthe forward extremity of saidfork, an actuating bar secured to said parallel members, a rack securedto said actuatin bar, a plate posit-ioned adjacent said rear wheel, asecond plate spaced from said first mentioned plate, a gear positionedbetween said plates, a clutch mechanism positioned in said gear in sucha manner as to rotate said rear wheel in one direction only, the teethof said gear meshing with the teeth of said rack bar, and segmentalstops formed at the opposite ends of said rack bar for the purposespecified.

In testimony whereof I afiix my signature.

WILLIAM] JERRAE.

